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        Hertfordshire
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        77 API jobs in Watford + 20 miles

        Senior Full Stack Developer JavaScript Python API

        Client Server
        W6, West London
        £85000 - £100000 per annum
        Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k Opportunity to progress your career in a senior, hands-on Senior Full Stack Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Full Stack Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
        Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k Opportunity to progress your career in a senior, hands-on Senior Full Stack Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Full Stack Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
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        NEWPREMIUM
        Backend Polyglot Integration Developer – Modern PHP, APIs, Cloud Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing code PHP 8.2 or Python 3.1x to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Polyglot Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation.
        Backend Polyglot Integration Developer – Modern PHP, APIs, Cloud Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing code PHP 8.2 or Python 3.1x to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Polyglot Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation.
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        NEWFEATURED
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
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        NEWFEATURED

        Fidessa Developer Java - Capital Markets

        Client Server
        The City, EC3
        £100000 - £135000 per annum + bonus + benefits
        Fidessa Developer (Java Spring Boot API) London to £135k Do you have strong Java coding skills combined with experience of developing on the Fidessa order management system? You could be progressing your career at the Investment Management arm of a global bank, gaining an indepth knowledge of Capital Markets. As a Fidessa Developer you will design and develop new features on the Fidessa order management system, collaborating closely with regional and global business stakeholders to understand their requirements and architect, design and execute technical solutions. You'll be based in the London office and have flexibility to work from home once a week. * You have a deep knowledge of Java including Spring Boot and APIs * You have strong experience of developing on Fidessa * You have an understanding of Capital Markets
        Fidessa Developer (Java Spring Boot API) London to £135k Do you have strong Java coding skills combined with experience of developing on the Fidessa order management system? You could be progressing your career at the Investment Management arm of a global bank, gaining an indepth knowledge of Capital Markets. As a Fidessa Developer you will design and develop new features on the Fidessa order management system, collaborating closely with regional and global business stakeholders to understand their requirements and architect, design and execute technical solutions. You'll be based in the London office and have flexibility to work from home once a week. * You have a deep knowledge of Java including Spring Boot and APIs * You have strong experience of developing on Fidessa * You have an understanding of Capital Markets
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        NEWPREMIUM
        AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.
        AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.
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        NEWFEATURED

        Business System Manager

        Corecruitment International
        UB8, Uxbridge
        £55k - 65k per year + .
        We’re looking for a technically skilled, solutions-focused individual to run an entire technical operation solo. This is a highly autonomous role, perfect for someone who thrives on building, managing, and continuously improving the systems that keep a fast-moving business running smoothly. From data pipelines to automation workflows, you will ensure every technical aspect of the business operates efficiently and strategically. * Own all technology systems and processes across the business. * Design, build, and maintain data pipelines integrating POS, kitchen operations, labor, and inventory systems. * Develop and manage dashboards and reporting tools for leadership and operations. * Build and maintain low/no-code automation workflows to streamline operations. * Manage API integrations between platforms.
        We’re looking for a technically skilled, solutions-focused individual to run an entire technical operation solo. This is a highly autonomous role, perfect for someone who thrives on building, managing, and continuously improving the systems that keep a fast-moving business running smoothly. From data pipelines to automation workflows, you will ensure every technical aspect of the business operates efficiently and strategically. * Own all technology systems and processes across the business. * Design, build, and maintain data pipelines integrating POS, kitchen operations, labor, and inventory systems. * Develop and manage dashboards and reporting tools for leadership and operations. * Build and maintain low/no-code automation workflows to streamline operations. * Manage API integrations between platforms.
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        NEWFEATURED

        Intergration Engineer

        Develop
        EC1, City of London
        £55000.00 - £70000.00 per annum
        We are seeking a skilled Integration Developer responsible for the end-to-end design, development, and maintenance of secure, resilient integrations between various systems using NodeJS/Node-RED and Microsoft SQL Server. This role includes building real-time monitoring dashboards to support critical business workflows, streamline approval processes, and facilitate accurate data reconciliation. A strong emphasis is placed on creating scalable, testable integration pipelines with effective error management, high availability, and full lifecycle testing to ensure robust API interactions and telemetry tracking. * Proficiency in workflow automation tools, including the creation of custom logic and complex process flows * Deep understanding of Microsoft SQL Server, including schema design, performance optimization, and indexing strategies
        We are seeking a skilled Integration Developer responsible for the end-to-end design, development, and maintenance of secure, resilient integrations between various systems using NodeJS/Node-RED and Microsoft SQL Server. This role includes building real-time monitoring dashboards to support critical business workflows, streamline approval processes, and facilitate accurate data reconciliation. A strong emphasis is placed on creating scalable, testable integration pipelines with effective error management, high availability, and full lifecycle testing to ensure robust API interactions and telemetry tracking. * Proficiency in workflow automation tools, including the creation of custom logic and complex process flows * Deep understanding of Microsoft SQL Server, including schema design, performance optimization, and indexing strategies
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        NEW

        IVR Specialist

        Crone Corkill
        Grays Inn, WC1
        £70000 - £80000 per annum
        London | Hybrid £70,000 - £80,000 per annum Is this the IVR Specialist role for you? Crone Corkill are assisting a technology consultancy as the look to hire an IVR (Interactive Voice Response) Specialist on a permanent basis. This could also be considered as a Lead or Architect position, so please apply if you feel suitable. Theyre ideally looking for someone who has worked with Cisco IVR and has conversational AI solutioning experience. Based on feedback, theyd ideally like to see candidates with a strong focus on application level experience rather than just implementation, so if you have experience with Cisco IVR systems in contact centre or customer service environments, this could be the role for you! This is a pivotal hire as they look to modernise customer interactions, migrating from legacy IVR to intelligent, natural language-driven experiences.
        London | Hybrid £70,000 - £80,000 per annum Is this the IVR Specialist role for you? Crone Corkill are assisting a technology consultancy as the look to hire an IVR (Interactive Voice Response) Specialist on a permanent basis. This could also be considered as a Lead or Architect position, so please apply if you feel suitable. Theyre ideally looking for someone who has worked with Cisco IVR and has conversational AI solutioning experience. Based on feedback, theyd ideally like to see candidates with a strong focus on application level experience rather than just implementation, so if you have experience with Cisco IVR systems in contact centre or customer service environments, this could be the role for you! This is a pivotal hire as they look to modernise customer interactions, migrating from legacy IVR to intelligent, natural language-driven experiences.
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        NEW
        Job Title: SFMC Developer (Marketing Cloud) Location: UK Role Summary As a Salesforce Marketing Cloud Developer, you'll play a key role in designing, building, and optimising Marketing Cloud solutions. You'll collaborate with cross-functional teams to deliver impactful campaigns, seamless customer journeys, and data-driven automation. Responsibilities * Hands-on expertise in Salesforce Marketing Cloud (Email Studio, Automation Studio, Contact Builder, Journey Builder, Mobile Studio). * Strong knowledge of Marketing Cloud Connect. * Proficiency in SQL, AMPscript, SSJS, HTML, CSS, JavaScript. * Experience working with REST and SOAP APIs (WSProxy or other server-side programming languages is a plus). Essential Skills & Experience * Experience with Salesforce Marketing Cloud.
        Job Title: SFMC Developer (Marketing Cloud) Location: UK Role Summary As a Salesforce Marketing Cloud Developer, you'll play a key role in designing, building, and optimising Marketing Cloud solutions. You'll collaborate with cross-functional teams to deliver impactful campaigns, seamless customer journeys, and data-driven automation. Responsibilities * Hands-on expertise in Salesforce Marketing Cloud (Email Studio, Automation Studio, Contact Builder, Journey Builder, Mobile Studio). * Strong knowledge of Marketing Cloud Connect. * Proficiency in SQL, AMPscript, SSJS, HTML, CSS, JavaScript. * Experience working with REST and SOAP APIs (WSProxy or other server-side programming languages is a plus). Essential Skills & Experience * Experience with Salesforce Marketing Cloud.
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        NEWFEATURED
        Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. Were building a more open world. Join us. Introduction to team
        Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. Were building a more open world. Join us. Introduction to team
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        NEW
        £50,000 to 60,000 GBP Bonus Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Location: London (Hybrid - 3 days in office: Tue/Wed/Thu) Salary: £50,000 to £60,000 + bonus and benefits Type: Full-time, Permanent Do you want to design and deliver solutions using the latest cloud services, AI, and emerging technologies to solve real-world challenges? This is a fantastic opportunity for an experienced engineer with a cloud-first mindset who thrives on creating innovative prototypes and scalable solutions. What you'll be doing * Designing and developing prototypes and Proof of Concepts using cloud services, AI, VR/AR, Edge AI, and more. * Supporting the delivery of group-wide digital initiatives, including in-house Generative AI solutions.
        £50,000 to 60,000 GBP Bonus Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Location: London (Hybrid - 3 days in office: Tue/Wed/Thu) Salary: £50,000 to £60,000 + bonus and benefits Type: Full-time, Permanent Do you want to design and deliver solutions using the latest cloud services, AI, and emerging technologies to solve real-world challenges? This is a fantastic opportunity for an experienced engineer with a cloud-first mindset who thrives on creating innovative prototypes and scalable solutions. What you'll be doing * Designing and developing prototypes and Proof of Concepts using cloud services, AI, VR/AR, Edge AI, and more. * Supporting the delivery of group-wide digital initiatives, including in-house Generative AI solutions.
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        NEWPREMIUM

        Technical Program Manager

        Halian Technology Limited
        Bengo, SG14 1PB
        From £95,000 to £105,000 per annum
        Technical Programme Manager eCommerce/ SaaS Hertfordshire About the Role Were looking for aTechnical Programme Managerto lead a majordigital transformation programmefor a leadingeCommerce client. Youll manage multiple software and DevOps workstreams, driving delivery excellence across engineering, platform, and product teams. This is ahands-on technical leadership role ideal for someone who thrives at the intersection of technology, delivery, and business change. Key Responsibilities * Lead end-to-end delivery ofsoftware, platform, and DevOps projects. * Manage asmall, high-performing delivery teamacross multiple workstreams. * Work closely withengineering and architectureto deliver scalable, cloud-based solutions. * EmbedAgile and DevOpspractices (CI/CD, automation, IaC, cloud). * Drive programme planning, governance, risks, and reporting.
        Technical Programme Manager eCommerce/ SaaS Hertfordshire About the Role Were looking for aTechnical Programme Managerto lead a majordigital transformation programmefor a leadingeCommerce client. Youll manage multiple software and DevOps workstreams, driving delivery excellence across engineering, platform, and product teams. This is ahands-on technical leadership role ideal for someone who thrives at the intersection of technology, delivery, and business change. Key Responsibilities * Lead end-to-end delivery ofsoftware, platform, and DevOps projects. * Manage asmall, high-performing delivery teamacross multiple workstreams. * Work closely withengineering and architectureto deliver scalable, cloud-based solutions. * EmbedAgile and DevOpspractices (CI/CD, automation, IaC, cloud). * Drive programme planning, governance, risks, and reporting.
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        NEW
        We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
        We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
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        NEW
        We are looking for an enthusiastic and proactive Automation Test Engineer who boasts experience with Python and Pytest to join our fantastic London based fintech client, working largely remote with monthly get togethers. This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium and Appium. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
        We are looking for an enthusiastic and proactive Automation Test Engineer who boasts experience with Python and Pytest to join our fantastic London based fintech client, working largely remote with monthly get togethers. This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium and Appium. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
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        NEW

        Full Stack Developer Java AWS React - Fintech

        Client Server
        EC2A, City of London
        £85000 - £110000 per annum + equity + benefits
        Full Stack Developer / Software Engineer (Java AWS React) London / WFH to £110k Are you a technologist looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Full Stack Developer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
        Full Stack Developer / Software Engineer (Java AWS React) London / WFH to £110k Are you a technologist looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Full Stack Developer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
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        NEWPREMIUM
        Want to become a go-to CRM configuration specialist, while working remotely with equity upside? Great opportunity to join rapidly growing consultancy delivering to the Wealth Management / IFA space. A company that believes in developing its people and focuses on delivery rather than presenteeism. Role CRM Configuration Specialist aka CRM Consultant, CRM Analyst, Implementation Consultant Location Remote UK, Flex Start / Finish times Salary 50 - 60K, Bonus, Equity, 5% Pension, 25 Days, Health plan We’re seeking a Configuration Specialist to configure and optimise platforms such as Curo Xplan, Intelligent Office or Plannr helping financial services firms streamline operations and deliver impact. * Hands-on experience configuring CRM systems - Ideally in Wealth Management * Strong analytical skills to translate business needs into solutions
        Want to become a go-to CRM configuration specialist, while working remotely with equity upside? Great opportunity to join rapidly growing consultancy delivering to the Wealth Management / IFA space. A company that believes in developing its people and focuses on delivery rather than presenteeism. Role CRM Configuration Specialist aka CRM Consultant, CRM Analyst, Implementation Consultant Location Remote UK, Flex Start / Finish times Salary 50 - 60K, Bonus, Equity, 5% Pension, 25 Days, Health plan We’re seeking a Configuration Specialist to configure and optimise platforms such as Curo Xplan, Intelligent Office or Plannr helping financial services firms streamline operations and deliver impact. * Hands-on experience configuring CRM systems - Ideally in Wealth Management * Strong analytical skills to translate business needs into solutions
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        NEWFEATURED
        * Location: Hybrid (1 day a week in London, UK) * Contract Duration: 9-12 months * Rate: 480per day (Outside IR35) Exciting Projects:Work on innovative digital solutions in a start-up environment. Flexible Working:Enjoy a hybrid role with one day a week in London. Collaborative Culture:Be part of a talented, supportive team that values your input. We are recruiting on behalf of an innovative Design Agencylooking forexperiencedPython Developers. This is an excellent opportunity for experienced developers eager to work on exciting projects in a dynamic and fast-paced environment. Our client is a rapidly expanding start-up specialising in events services and design, applyingthe power of their collective imagination to creative, commercial, and cultural challenges for massive enterprises such as Amazon and Google
        * Location: Hybrid (1 day a week in London, UK) * Contract Duration: 9-12 months * Rate: 480per day (Outside IR35) Exciting Projects:Work on innovative digital solutions in a start-up environment. Flexible Working:Enjoy a hybrid role with one day a week in London. Collaborative Culture:Be part of a talented, supportive team that values your input. We are recruiting on behalf of an innovative Design Agencylooking forexperiencedPython Developers. This is an excellent opportunity for experienced developers eager to work on exciting projects in a dynamic and fast-paced environment. Our client is a rapidly expanding start-up specialising in events services and design, applyingthe power of their collective imagination to creative, commercial, and cultural challenges for massive enterprises such as Amazon and Google
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        NEW
        Espire Infolabs is hiring for Front End Developer(React.js) for London, UK location. Role :Front End Developer(React.js) Location: London, UK(3 Days/Week onsite) Desired Industry Experience:5+ years Relevant Experience:React. Js, Typescript, Azure Proven experience as a Front-End Developer with a focus on React.js, and Typescript. Familiarity with C# and .Net. Strong proficiency in JavaScript, ES6/ES7, and related front-end technologies. Familiarity with state management libraries such as Redux. Experience with version control systems, such as Git. Experience with the Web Content Accessibility Guidelines. Knowledge of responsive web design principles and CSS frameworks. Understanding of RESTful APIs and asynchronous data retrieval. Experience with unit testing. Strong problem-solving and debugging skills. Excellent teamwork and communication skills.
        Espire Infolabs is hiring for Front End Developer(React.js) for London, UK location. Role :Front End Developer(React.js) Location: London, UK(3 Days/Week onsite) Desired Industry Experience:5+ years Relevant Experience:React. Js, Typescript, Azure Proven experience as a Front-End Developer with a focus on React.js, and Typescript. Familiarity with C# and .Net. Strong proficiency in JavaScript, ES6/ES7, and related front-end technologies. Familiarity with state management libraries such as Redux. Experience with version control systems, such as Git. Experience with the Web Content Accessibility Guidelines. Knowledge of responsive web design principles and CSS frameworks. Understanding of RESTful APIs and asynchronous data retrieval. Experience with unit testing. Strong problem-solving and debugging skills. Excellent teamwork and communication skills.
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        NEWFEATURED

        Senior Backend Software Engineer (Python)

        Plexus Resource Solutions Ltd
        EC1A, City of London
        From £90,000 to £120,000 per annum
        Web3 London, England £90-£120K Plexus are working with a company that are building the future of gaming by introducing equitable ownership and compensation models powered by blockchain. Through our suite of Web3 games and DAO-driven products, we create opportunities for players worldwide to share in the value they help create. As a Senior Backend Engineer, youll play a key role in shaping the infrastructure behind Web3 products. From crafting Python-based APIs to building seamless blockchain integrations, youll help power a platform that brings decentralized ownership to the next generation of gaming Responsibilities * Architect and develop backend systems to power Web3 applications * Build and deploy RESTful APIs using Python * Connect backend services with Web3 protocols, blockchains, DAOs, and smart contracts What we're looking for
        Web3 London, England £90-£120K Plexus are working with a company that are building the future of gaming by introducing equitable ownership and compensation models powered by blockchain. Through our suite of Web3 games and DAO-driven products, we create opportunities for players worldwide to share in the value they help create. As a Senior Backend Engineer, youll play a key role in shaping the infrastructure behind Web3 products. From crafting Python-based APIs to building seamless blockchain integrations, youll help power a platform that brings decentralized ownership to the next generation of gaming Responsibilities * Architect and develop backend systems to power Web3 applications * Build and deploy RESTful APIs using Python * Connect backend services with Web3 protocols, blockchains, DAOs, and smart contracts What we're looking for
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        NEW

        Full Stack Engineer TypeScript

        Client Server
        South Kensington, SW7
        £65000 - £75000 per annum + benefits
        Full Stack Engineer / Developer (TypeScript) London to £75k Opportunity to progress your career at a Tech for Good company that is enabling life changing education to be accessed by students around the world. As a Full Stack Engineer you will design and develop large, distributed, scalable web based systems, working within a modern cloud (AWS) microservices based environment; you'll be primarily using Typescript and Node for backend development, but will also have exposure to React on the frontend. You'll work across multiple teams and product streams in a collaborative environment that values code quality.
        Full Stack Engineer / Developer (TypeScript) London to £75k Opportunity to progress your career at a Tech for Good company that is enabling life changing education to be accessed by students around the world. As a Full Stack Engineer you will design and develop large, distributed, scalable web based systems, working within a modern cloud (AWS) microservices based environment; you'll be primarily using Typescript and Node for backend development, but will also have exposure to React on the frontend. You'll work across multiple teams and product streams in a collaborative environment that values code quality.
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        NEWPREMIUM

        Backend Engineer Python

        Plexus Resource Solutions Ltd
        EC1, City of London
        From £90,000 to £120,000 per annum
        Backend Engineer On-Chain Social Network Remote £90k £120k Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience Benefits * Competitive salary * Top-quality medical, dental & vision insurance
        Backend Engineer On-Chain Social Network Remote £90k £120k Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience Benefits * Competitive salary * Top-quality medical, dental & vision insurance
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        NEW
        Contract / Outside IR35 A leading UK-based organisation is undergoing a strategic transformation of its enterprise systems, with Workday at the core of its HR and finance operations. We're seeking a Lead Integration Architect to design and oversee the integration landscape, ensuring seamless data flows across platforms using Workato. Key Responsibilities * Define and lead integration architecture across Workday and other enterprise platforms * Develop scalable, reusable integration patterns using Workato and other middleware tools * Ensure alignment with enterprise architecture principles and IT governance * Collaborate with Workday implementation teams to ensure integration readiness * Design and implement data flows between Workday and legacy systems * Support data migration, validation, and reconciliation * Own Workato platform governance, performance, and roadmap
        Contract / Outside IR35 A leading UK-based organisation is undergoing a strategic transformation of its enterprise systems, with Workday at the core of its HR and finance operations. We're seeking a Lead Integration Architect to design and oversee the integration landscape, ensuring seamless data flows across platforms using Workato. Key Responsibilities * Define and lead integration architecture across Workday and other enterprise platforms * Develop scalable, reusable integration patterns using Workato and other middleware tools * Ensure alignment with enterprise architecture principles and IT governance * Collaborate with Workday implementation teams to ensure integration readiness * Design and implement data flows between Workday and legacy systems * Support data migration, validation, and reconciliation * Own Workato platform governance, performance, and roadmap
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        NEW

        Senior Solution Architect

        UK Health Security Agency
        Canary Wharf, E14 4PU
        From £54,416 to £68,344 per annum
        The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health
        The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health
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        NEW

        Front End Engineer React - Hedge Fund

        Client Server
        Victoria, SW1
        £60000 - £95000 per annum + bonus + benefits
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
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        NEWPREMIUM

        Non-Functional Testing Engineer

        McGregor Boyall Associates Limited
        E1, East London
        £75000 - £850000 per annum + + Additional Benefits
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy.
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy.
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        How many API jobs are there in Watford?
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